JP2564759B2 - Simple waste liquid treatment device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a simple waste liquid treatment apparatus used for treating a relatively small scale waste liquid.

[0002]

2. Description of the Related Art Conventionally, a relatively large amount of waste liquid discharged in chemical laboratories, factories and the like has been purified by a waste liquid treatment device and discharged as treated water. A conventional waste liquid treatment device is mainly composed of a waste liquid collection tank, a chemical introduction device, a reaction settling tank, a sludge treatment unit, and a supernatant water treatment unit,
The waste liquid is collected from the waste liquid collection tank by the waste liquid transfer pump to the reaction settling tank, flocs are formed by chemicals such as neutralizing agent and coagulant, and the sludge processing unit treats the flocs settling in the lower layer of the sedimentation tank and the supernatant water processing unit. The treated water in the reaction tank is treated with activated carbon or an ion exchange resin, and the purified treated water is discharged.

[0003]

However, in recent years, there is an increasing need to protect the natural environment, and not only such a large amount of waste liquid but also a small-scale waste liquid in a chemical experiment facility should be treated. In addition, it is of great significance for education to recognize the importance of waste liquid treatment and the importance of protecting the natural environment by conducting experiments on the waste liquid treatment process. On the other hand, the above-mentioned conventional waste liquid treatment device has a disadvantage that it is not suitable for simple treatment of a small amount of waste liquid, and even if the device is simply downsized, the treatment operation cannot be performed safely and easily. Moreover, the conventional apparatus has a structure in which it is difficult to directly observe the waste liquid treatment process.

Therefore, the present invention provides a simple waste liquid treatment apparatus which eliminates the above-mentioned conventional inconveniences, is suitable for simple treatment of a small amount of waste liquid, and can perform the treatment operation safely and easily. The purpose is to Another object of the present invention is to provide a simple waste liquid treatment apparatus which allows direct observation of the waste liquid treatment process.

[0005]

As a technical means for solving the above-mentioned problems, in the first invention, the waste liquid is removed by filtering the reaction liquid obtained by reacting the waste liquid with a chemical in the reaction tank. It is a device for processing , and
The dropper member provided on the upper part,
By operating the, the drug in the drug tank is pressurized to
The drug introduction part that discharges the agent from the drug tank to the reaction tank, and the reaction liquid is allowed to flow naturally by being provided below the drug tank of this drug introduction part.
And the cock that opens and closes this outlet
And a reaction tank having a
The reaction liquid discharged from the reaction tank is filtered by gravity flow.
A simple waste liquid treatment device equipped with an over tank was created.

The second invention is an apparatus for treating the waste liquid by filtering the reaction liquid obtained by reacting the waste liquid and the chemical in the reaction tank, which is installed on the chemical tank and the upper part of the chemical tank.
A medicine pressurizing member for operating the medicine pressurizing member.
By pressurizing the drug in the drug tank,
A drug introducing portion provided so as to be discharged from the tank to the reaction tank, a reaction tank provided below the drug tank of the drug introducing portion and having a reaction solution discharge port, and a reaction tank provided below the reaction tank. And a filtration tank for filtering the reaction liquid discharged from the reaction tank, and the reaction tank and / or the front surface of the apparatus of the filtration tank are made of a transparent base material. further,
In this apparatus, a stirring blade is provided in the reaction tank.

The waste liquid is mainly an acid / alkali waste liquid and a heavy metal-containing waste liquid. The above-mentioned agents are mainly neutralizing agents such as acids and alkalis, aggregating agents, aggregating aids, etc.

[0008]

According to the first aspect of the invention, the drug introducing section, the reaction tank, the filter
Overpass tanks are arranged so as to correspond to the top and bottom, and the reaction liquid is naturally discharged.
Efficient with a narrow space for waste liquid treatment process due to discharge and natural filtration
Is done in a regular manner. For drug introduction, dropper part at the top of the drug tank
Be sure to pressurize the material to introduce the drug.
It will operate above the drug. Therefore,
Even if the connection between the dropper and the chemical tank is poor, the dropper
As long as the parts are operated
Will not hurt you. According to the dropper member,
Fine adjustment of the discharge amount can be easily performed by the compression operation. Ma
Further, according to the second aspect of the invention, since the front surface of the apparatus is the transparent substrate, the process of treating the waste liquid can be observed from the upper side to the lower side. The stirring by the blade does not wind up the toxic gas even if the toxic gas is generated in the reaction tank.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment embodying the present invention will be described below with reference to FIGS. The present invention is
The present invention is not limited to the examples below. FIG. 1 shows the cross-sectional structure of the simple waste liquid treatment apparatus of this embodiment. This simple waste liquid treatment device is composed of an activated carbon tank 6 and a filtration tank 1 from bottom to top.
2. The reaction tank 20 and the chemical introduction unit 30 are configured in this order, and the waste liquid introduced into the upper reaction tank 20 is flown from the top to the reaction tank 20, the filtration tank 12, the activated carbon tank 6 and the lower processing unit in order to perform each treatment. The activated carbon tank 6 is discharged from the back as treated water. Each of the processing units is arranged in a vertically long space having a substantially square cross section surrounded by a side plate 2 and a back plate 4 which also serve as legs 2a for stable placement on a laboratory table or the like.

As shown in FIGS. 1 and 2, the side plate 2 has a height up to the upper end of the reaction tank 20 for supporting the above respective parts from the left and right sides, and the lower part thereof can be stably placed on a laboratory table. The front and rear sides are bifurcated legs 2a. The side plate 2 is made of transparent plastic so that the waste liquid treatment process can be easily observed from the outside. The back plate 4 is provided between the left and right side plates 2 at the rear of the device 1 and has a predetermined hole portion for supporting the treatment portions and for inserting the treated water discharge tube 10 and the power cord. Is installed at the position.

The lowermost activated carbon tank 6 of the apparatus 1 is in the form of a container opened upward, and inside thereof is an activated carbon bag 8 in which about 1 liter of activated carbon 8A is hermetically packed in a bag made of a water-permeable material. It is installed to remove a trace amount of heavy metals and organic substances contained in the primary treated water treated in the upper filtration tank 12 and reduce the chromaticity (FIG. 4).
reference). As shown in FIG. 1, the water filtered by the activated carbon 8A is discharged to the outside of the device 1 by a treated water discharge tube 10 connected to the rear part of the activated carbon tank 6.

A filtration tank 12 located above the activated carbon tank 6.
Is made of transparent plastic (in the present embodiment, made of transparent polyvinyl chloride) in the shape of a container that opens upward in a rectangular shape, and has a size capable of treating about 3 liters of reaction water. As shown in FIG. 1, the filter tank 12 is provided with a handle on the front surface and is formed in a drawer type so as to be able to be pulled out forward from the side plate 2. This facilitates replacement and cleaning of the filter medium 14 in the filter tank 12. ing. As shown in FIG.
A portion of the bottom portion 16 of the filtration tank 12 corresponding to the opening of the lower activated carbon tank 6 has a mesh structure having a large number of holes 16a to ensure the water permeability of the filter medium 14. Furthermore, as shown in FIG.
The crosspiece member 18 of the book is formed so that the filter medium 14 arranged in the filtration tank 12 does not adhere to the bottom portion 16.

As shown in FIG. 5, the filter medium 14 disposed in the filtration tank 12 is made of paper (or may be non-woven fabric or cloth), and is easily formed into a box shape by folding it along a predetermined folding line. The filtration tank 1
2 Can be matched to internal dimensions.

The reaction liquid is introduced from the reaction tank 20 above the filtration tank 12 through the water drain cock 24.

The reaction tank 20 into which the waste liquid is introduced and the reaction liquid is prepared is formed in the shape of a container having an upward opening, and is arranged at a height approximately at the center of the apparatus. The reaction tank 20 is large enough to handle about 3 liters of waste liquid. The bottom portion 21 is inclined downward toward the rear of the device 1, and has a lowermost portion 21a at a position close to the back plate 4 of the device 1, and at the lowermost portion 21a,
A hole 22 for draining water is provided through. A water drain pipe 23 continuing to the upper part of the filtration tank 12 is connected to the water drain hole 22, and a water drain cock 24 is provided in the water drain pipe 23 so that the cock can be manually fed from the front side of the apparatus 1. By operating 24, the reaction liquid in the reaction tank 20 can be discharged.

Further, the upper part of the reaction tank 20 is shielded and the chemical introduction part 30 and the agitator 26 are placed, but a hinge member is provided on the front side so that the waste liquid can be supplied to the reaction tank 20. A lid that opens and closes is provided at the rear of the device 1.

The stirrer 26 is placed in the upper rear part of the reaction tank 20 and is composed of a motor 27 with a speed reducer, a shaft 28 and an impeller 29. The motor 27 is arranged in the middle of the apparatus 1 and slightly rearward, and the shaft 28 having the impeller 29 at the tip from the lower side of the motor 27 has the reaction tank 20.
It hangs down from the rear at about the center. The impeller 29 reaches the vicinity of the bottom portion 21 of the reaction tank 20 so that the reaction liquid in the reaction tank 20 can be sufficiently stirred. Further, the impeller 29 is adjusted so that it can be rotated at a low speed by the motor 27 to the extent that the flocs formed in the reaction tank 20 are not destroyed.

The lid 2 of the reaction tank 20 in front of the motor 27
A drug introduction unit 30 is provided at a position that does not hinder the opening and closing of 5. The medicine introducing section 30 is formed by four medicine tanks 31 each having a dropper member (medicine pressurizing member) 32 and a medicine ejection tube 34 aligned in the left-right direction of the apparatus 1. As shown in FIG. 6, a chemical tank 31 filled with various chemicals is formed into a bottle-shaped container from a chemical-resistant base material, and a dropper member made of an elastic member such as plastic or rubber is formed on the upper portion thereof. 32 is attached integrally. In the present embodiment, the dropper member 32 is attached to the cap portion 31a above the medicine tank 31, and it is possible to discharge about 5 ml of the medicine from the medicine tank 31 by one compression operation.

The drug discharge tube 34 is formed to extend from the side surface portion near the bottom of the drug tank 31. That is, it is formed upward from the vicinity of the bottom portion along the side surface portion, bends downward near the top portion of the chemical tank 31, passes through the hole in the upper portion of the reaction tank 20, and the lower end of the tube 34 is slightly higher than the upper limit of the processing liquid in the reaction tank 20. It is supposed to come to a high position. At this position, the medicine discharged from the tube 34 is
It is a position where it is efficiently stirred by the impeller 29 of No. 6.

Further, in this embodiment, the reaction tank 20
PH meter 3 capable of measuring the pH of the reaction liquid inside
6 is installed between the chemical tanks 31, and the electrode portion 37 is connected to the reaction tank 20.
It is designed to be immersed in the reaction solution inside.

Next, a case of treating waste liquid using the simple waste liquid treatment apparatus 1 will be described with reference to FIG.
First, with the water drain cock 24 closed, a predetermined amount of acid / alkali waste liquid or heavy metal-containing waste liquid is put in by opening the lid 25 of the reaction tank 20. After charging the waste liquid, switch on the stirrer 26 and set the impeller 29 in the reaction tank 20.
Rotate and stir the waste liquid,
The upper dropper member 32 is compressed by hand from the front side of the apparatus 1 to discharge the drug into the reaction tank 20. When the waste liquid is an acid / alkali waste liquid, the dropper 32 of the chemical tank 31 for acid or alkali is operated to neutralize the waste liquid.
When the waste liquid is a heavy metal-containing waste liquid, a dropper member 32 for a flocculant or the like and a dropper member 3 for an acid or an alkali are used.
Operate 2 to react and neutralize the waste liquid.

Since the dropper member 32 in the upper portion of the medicine tank 31 is operated at the time of introducing the medicine, the medicine must be operated above the medicine. Therefore, even if the connection between the dropper member 32 and the drug tank 31 is poor and a strong acidic or strong alkaline drug leaks from the connection portion, as long as the dropper member 32 is operated, the hand to be operated is It does not hurt. That is, as in the conventional waste liquid treatment apparatus, in which a system for directly injecting a drug from a valve below a large drug tank is used to inject a drug by a cock operation under a drug tank as in a miniaturized system, a cock is fitted to each other. There is a case where a strongly acidic drug or the like leaks out due to the condition and the hand is injured, and a little skill is required to handle such a cock, but there is no such a problem in the device 1 of the present embodiment. Therefore, it is possible to safely and easily introduce a drug.

Further, since the dropper member 32 is located at the uppermost portion of the apparatus 1, the dropper member 32 can be easily compressed even from the front or side of the apparatus 1. In addition, it is designed to discharge about 5 ml of the drug in one compression operation, and the amount of the drug can be finely adjusted depending on the degree of compression. Obtainable.

Since the stirrer 26 rotates the impeller 29, even if toxic gas is accidentally generated, unlike the air stirring type, it does not wind up the toxic gas and is highly safe. Has become. Furthermore, the reaction state in the reaction tank 20, for example, a change such as formation of flocs, can be directly observed with the naked eye because the reaction tank 20 is transparent. Further, by closing the lid 25 at the time of reaction, it is possible to prevent splashing of the waste liquid at the time of discharging the medicine.

After the reaction is completed, the stirrer 26 is stopped and the water drain cock 24 is operated from the front of the apparatus 1 to drain the water.
Is opened, and the whole amount of the reaction liquid in the reaction tank 20 is charged into the filtration tank 12. In this case, the cock 24 at the bottom of the reaction tank 20
Even if it is operated by, the reaction solution is neutralized and is not dangerous. Further, since the water drain hole 22 is provided at the lowermost portion 21a of the reaction tank 20, the entire amount of the reaction liquid is naturally flowed down to the filtration tank by gravity. Unlike the conventional waste liquid treatment equipment, in such a total volume filtration method, flocs and supernatant water are not separately treated, so that the structure is simple and compact, and the reaction liquid is put into the filtration tank to a certain extent. Since it is not necessary to make a difficult decision as to whether or not it is suitable for simple processing.

The reaction liquid charged in the filtration tank 12 is supplied to the activated carbon tank 6 by natural filtration by gravity, passing through the filter medium 14, passing through the plate portion of the bottom portion 16 of the filtration tank 12.
In this filtration tank 12, mainly fine particles in the waste liquid and flocs generated by the reaction are removed. Further, the filtrate is passed through the activated carbon bag 8 in the activated carbon tank 6 to remove impurities, and is discharged from the treated water discharge tube 10 to the outside of the apparatus 1.

As described above, in the present apparatus 1, since the waste liquid treatment process is carried out from the top to the bottom by gravity flow and natural filtration and the total volume filtration system is adopted, the structure is simple and compact. ing. In addition, since the state of the reaction liquid and the movement of the treatment liquid can be directly observed, it is easy to understand the waste liquid treatment process, and it is possible to discover when there is an abnormality such as the generation of toxic gas, etc. It is easy to do.

Next, in order to maintain the device 1, it is necessary to replace the filter medium, etc., but in this device 1, the filter tank 12 is of a pull-out type, so that it can be easily separated from the device 1. Therefore, replacement of the filter medium 14 and cleaning of the filtration tank 12 are easy. Further, since the crosspiece member 18 is provided on the bottom portion 16 of the filtration tank 12, the filtering medium 14 is filtered by
Even if is pressed against the bottom portion 16, the portion where the crosspiece member 18 is provided is in a slightly raised state. Therefore, the filter medium 14 can be easily peeled off from the bottom portion 16,
Even a child can easily replace the filter medium 14 without breaking it. Further, since the lid 25 can be opened, cleaning of the reaction tank 20 and removal of flocs are easy.

In the apparatus 1 of this embodiment, the bottom portion 21 of the reaction tank 20 is inclined downward toward the rear of the apparatus 1 and the bottom 2
In 1a, a drainage hole 22 is provided, and a medicine tank 31 is arranged on the upper side and a stirrer 26 is arranged on the rear side. This facilitates the operation of the dropper member 32 on the upper part of the chemical tank 31, enables effective agitation in a deep water portion of the reaction tank 20, and further allows the reaction tank 20 and the filtration tank 12 in front of the apparatus 1. Since a large space between and can be taken, it is easy to operate the drain cock 24 at the rear of the device 1. That is,
Filtration tank 12, reaction tank 20, chemical introduction unit 30 and agitator 26
By arranging rationally, the waste liquid can be efficiently treated and the manual operation is easy. Further, according to this arrangement, the filter medium 20 can be easily replaced even if the filter tank 20 is not of the pull-out type.

The activated carbon tank 6 can be used as a filtrate collection tank when the activated carbon bag 8 is not provided. Further, in the present embodiment, the dropper member 32 is used as the medicine pressurizing member, but the present invention is not limited to this, and the medicine in the medicine tank is discharged by operating the cylinder member from above to move it up and down. It may be one that does.

[0031]

According to the first aspect of the invention, the waste liquid treatment step is constructed.
The respective processing units that are formed are arranged vertically, and the reaction solution is drained.
Since discharge and filtration are carried out by gravity flow,
The process can be performed efficiently, and the structure is compact.
Suitable for easy small-scale waste liquid treatment
It In addition, the introduction of chemicals controls the dropper member above the chemical tank.
It is done by making it above the drug
Since the operating hand is positioned, the operating hand touches the medicine.
Waste liquid treatment that ensures safety when introducing chemicals
It is a physical processing device. Also, according to the dropper member, the pressure
By the shrinking operation, the required amount of drug can be easily introduced. First
According to the second aspect of the invention, each processing unit that constitutes the waste liquid processing step
Are placed vertically, and the reaction solution is discharged and filtered by gravity.
Because it is carried out by natural flow by
It can be done and is compactly configured,
It is suitable for simple waste liquid treatment. Furthermore, since the front surface of the device is made of a transparent base material, the processing steps can be easily observed, and abnormalities can be easily found, which makes it particularly suitable as an educational science instrument. Further, since the reaction tank is equipped with a rotary stirrer, the toxic gas is not rolled up when the toxic gas is generated in the reaction tank, which is safe.

[Brief description of drawings]

FIG. 1 is a diagram showing a cross-sectional structure of a simple waste liquid treatment apparatus of this embodiment.

2A and 2B are a plan view and a front view of the simple waste liquid treatment apparatus according to the present embodiment.

FIG. 3 is a plan view and a cross-sectional view of a filtration tank of this embodiment.

FIG. 4 is a shape view of an activated carbon bag.

FIG. 5 is a shape diagram of a filter medium.

FIG. 6 is a view showing how the medicine tank is used.

FIG. 7 is an explanatory diagram of a waste liquid treatment process in the simple waste liquid treatment device of the present embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Simple waste liquid processing apparatus 12 ... Filtration layer 20 ... Reaction tank 22 ... Discharge port 30 ... Drug introduction part 31 ... Drug tank 32 ... Drug pressurizing member

Claims (3)

(57) [Claims] 1. An apparatus for treating waste liquid by filtering a reaction liquid obtained by reacting waste liquid with a chemical in a reaction tank , comprising a chemical tank and a dropper member provided above the chemical tank.
By operating this dropper member,
Pressurize the medicine of the above and discharge the medicine from the medicine tank to the reaction tank
It is provided below the drug introduction part and the drug tank of this drug introduction part , and the reaction liquid
The discharge port that discharges by free flowing and opening and closing this discharge port
A simple waste liquid treatment device comprising: a reaction tank having a cock; and a filtration tank provided below the reaction tank for filtering the reaction liquid discharged from the reaction tank by gravity flow . 2. A device for treating a waste liquid by filtering a reaction liquid obtained by reacting the waste liquid with a chemical in a reaction tank , the chemical tank and a chemical pressurizing member provided above the chemical tank. Equipped
By operating this medicine pressure member,
It is possible to pressurize the medicine of the above and discharge the medicine from the medicine tank to the reaction tank.
And a reaction tank provided below the chemical tank of the chemical introduction section and having a discharge port for the reaction liquid, and provided below the reaction tank and discharged from the reaction tank. A simple waste liquid treatment device comprising a filtration tank for filtering a reaction liquid, wherein the reaction tank and / or the front surface of the filtration tank is made of a transparent base material. 3. The simple waste liquid treatment device according to claim 2.
Te, simple, characterized in that it comprises a stirring blade in the reaction vessel
Waste liquid treatment equipment.